Explanation：睡

睡

睡's 部首 is 目, it refers to an eye. (check the link below to see the video 部首2.)

On the other part is "垂"."垂" as a verb means to fall or drop from top to bottom.

For example, "垂淚" means tears slowly rolling down the cheeks.

Of course, the eyes will not fall out of the eye sockets, only the eyelids will fall from top to bottom, so if your eyelids fall from top to bottom, it means you are asleep.

 

Now, let's look at the words that can be combined with "睡" to form 詞.

詞

Our first word is fall asleep 睡著

• 我一碰到枕頭，就睡著了。
  I fell asleep as soon as my head hit the pillow.

The situation like the example sentence is the so-called "熟睡" (sleep soundly).

• 小聲一點，小寶寶正熟睡著。
  Keep your voice down, the baby is sleeping soundly.
  

The opposite of this word is to be fully awake.毫無睡意

• 我毫無睡意的躺在床上，看著天花板。
  I was lying on the bed, fully awake, looking at the ceiling.
  

The result of lying in bed without sleep is that you will 睡過頭(oversleep) the next day.

• 我睡過頭，結果上班遲到了。
  I overslept and was late for work.
  

Or you didn't oversleep, but you were 昏昏欲睡(drowsy) all day.

• 教室非常暖和，老師授課的聲音讓人昏昏欲睡。
  The classroom is very warm and the teacher’s voice makes people drowsy.
  

If you accidentally fall asleep, the teacher will ask you why you 打瞌睡dozed off. But you can't tell him that.

• 老師單調的聲音太催眠了，我忍不住打瞌睡了。
  The teacher's monotone voice was so soothing that I couldn't help but doze off.

Or can you?

Such brief sleep during the day is called 小睡 or 打盹(catnap).

• 我想小睡一下，別吵我。
  I want to take a nap, don't disturb me.
  

When you wake up in the morning, but you think about the day off, so you decide to go back to sleep, it is called 睡回籠覺(crawl back in bed).

• 我看到一篇報導說睡回籠覺對身體好，所以我決定睡一整天。
  I had read a report that crawling back in bed is good for your health, so I planned to spend the whole day doing just that.
  

Let's finish by learning the postures for sleeping 睡姿.

趴睡 sleep on one's stomach

仰睡 sleep on one's back

側睡 sleep on one's side